fischer Intumescent Putty Pads FiPP are manufactured from a red, non-setting, silicone based intumescent polymer and tested in accordance with BS EN 1366-3 for up to 2 hour fire rating and 2 hour insulation. Available as internal and external version, the FiPP is also available in different sizes to suit different socket versions.- Simple and quick installation.- Excellent acoustic properties.- No electrical conductivity.- Primerless adhesion to most substrates.- Excellent acoustic properties- Air permeability